Sit-up exerciser

ABSTRACT

A sit-up exerciser has a body and a back bracket. The back bracket is mounted on and pivotally connects to the body. Multiple elastic elements transversely connect to the lower end of the back bracket and the body. When a user&#39;s back presses against the back bracket, the back bracket can be pivoted relative to the body. Meanwhile, the user should resist the resilient force of the elastic elements to keep exercising. Furthermore, the exerciser has a small volume for convenient storage.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a sit-up exerciser, and more particularly to a sit-up exerciser with a small volume and easy to be moved.

2. Description of the Related Art

At present, all kinds of exercisers are introduced into the market for people to exercise indoor such as walk exercisers, weight lifters, etc. However, a conventional sit-up exerciser is rare in the market and is usually set up in the gym. Furthermore, the conventional sit-up exerciser has a large volume and a heavy weight with inconvenient moving.

Therefore, the invention provides a sit-up exerciser to mitigate or obviate the aforementioned problems.

SUMMARY OF THE INVENTION

The main objective of the present invention is to provide a sit-up exerciser with a small volume and easy to be moved.

Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a sit-up exerciser in accordance with the present invention;

FIG. 2 is an exploded perspective view of the sit-up exerciser in FIG. 1;

FIG. 3 is another perspective view of the sit-up exerciser in FIG. 1;

FIG. 4 is an operational side view of the sit-up exerciser in FIG. 1;

FIG. 5 is another operational side view of the sit-up exerciser in FIG. 1; and

FIG. 6 is an operational perspective view the sit-up exerciser in FIG. 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

With reference to FIGS. 1-3, a sit-up exerciser in accordance with the present invention has a body (10), a back bracket (20) and two armrest assemblies (30).

The body (10) has two parallel and curved side stretchers (11), a back stretcher (12), a seat (15) and a front stretcher (14). Each side stretcher (11) has a foot integrally formed in an end of the side stretcher (11) so that the foot can stand on the ground to support the body (10). The back stretcher (12) is provided transversely between the side stretchers (11) and has multiple evenly-spaced hooks (120) respectively defined in the back stretcher (12) and two fasteners (13) mounted on a middle of the back stretcher (12). The seat (15) is mounted transversely between front parts of the side stretchers (11). The front stretcher (14) is mounted transversely in a low front end of the seat (15).

The back bracket (20) is mounted between and extends upward from the side stretchers (11) and has two rods (21), multiple evenly-spaced cylinders (22), a post (23) and multiple elastic elements (24). The rods (21) are respectively mounted pivotally on the fasteners (13) of the body (10) and respectively have an lower end. The cylinders (22) are mounted transversely between the rods (21). The post (23) is mounted between the lower ends of the rods (21), aligns with the back stretcher (12) and has multiple hooks (230) corresponding to the hooks (120) on the back stretcher (12). The elastic elements (24) are mounted between the back stretcher (12) and the post (23) and each elastic element (24) connects to the corresponding hooks (120) on the back stretcher (12) and the post (23). In this preferred embodiment of the present invention, the elastic elements (24) are springs.

The armrest assemblies (30) are mounted respectively on two sides of the body (10). Each armrest assembly (30) has a mounting bar (31) and an armrest (32). The mounting bar (31) engages with the front stretcher (14). The armrest (32) is arcuate and connects to the mounting bar (31).

With further reference to FIG. 4, a user sits in the seat (15) and leans against the cylinders (22). Arms of the user can rest on the armrests (32). When the user's back presses against the back bracket (15), the back bracket (20) can be pivoted relative to the body (10). Meanwhile, the user should resist the resilient force of the elastic elements (24) to keep exercising.

With further reference to FIGS. 5 and 6, the user's back stops pressing against the back bracket (15), the resilient force of the elastic elements (24) pushes the back bracket (20) to resume to an original status. Because the structure of the present invention is simple, the present invention occupies a small volume and is easy to be moved.

It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only. Changes may be made in details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed. 

1. A sit-up exerciser comprising: a body having multiple feet formed respectively on two ends of the body, and each foot having a distal end; a back stretcher provided transversely in the body near one end of the body; two fasteners formed on a middle portion of the body; and a seat mounted on a top portion of the body near the other end of the body; a back bracket mounted on and extending upward from the body between the seat and the back stretcher and having a lower end pivotally connecting to the fastener; and multiple elastic elements mounted between the lower end of the back bracket and the back stretcher; and armrest assemblies being mounted respectively on two sides of the body, and each armrest assembly having an armrest having a distal end being at the same level of the distal end of the foot of each side stretcher.
 2. The sit-up exerciser as claimed in claim 1, wherein the body has two parallel and curved side stretchers, and each side stretcher has two ends; and the feet of the body are formed respectively on the two ends of the side stretchers.
 3. The sit-up exerciser as claimed in claim 2, wherein the body has a front stretcher mounted transversely in a low front end of the seat; and each armrest assembly further has a mounting bar engaging the front stretcher; and the armrest of each armrest assembly being curved and protruding backward and further having a proximal end connecting to the mounting bar.
 4. The sit-up exerciser as claimed in claim 1, wherein the back bracket has two rods respectively mounted pivotally on the fasteners of the body; and multiple cylinders mounted transversely between the rods. 5 The sit-up exerciser as claimed in claim 4, wherein the back stretcher of the body has multiple evenly-spaced hooks; the post of the back bracket has multiple hooks corresponding to the hooks on the back stretcher; and each elastic element connects to one of the hooks on the back stretcher and a corresponding one of the hooks on the post. 6 The sit-up exerciser as claimed in claim 5, wherein the elastic elements are springs. 